function setDisplay(objectID, state)
 {
    var object = document.getElementById(objectID);
    object.style.display = state;
 }
 function toggleDisplay(objectID)
 {
    var object = document.getElementById(objectID);
    state = object.style.display;
    if (state == 'none')
    object.style.display = 'block';
    else if (state != 'none')
    object.style.display = 'none';
 }